That would make sense because hunters are all agility and arc blade makes them very deadly, fists of havoc for us titans, a well aimed shot from a shotgun can drop us before we make it to the ground, but resonance however, it takes a full 3 shots sometimes 4 to drop a warlock using it.

Lol it takes 1 headshot with a sniper to put down a Warlock in Radiance, however it takes 2 headshots for a Fist of Havoc and Bladedancer. I have yet to see a Titan taken down by 1 shot with a shotgun mid super and Warlocks are by far the easiest of the overshield supers, sounds ot me like you are just a little low on skill.

I don't spend all my time on destiny to get good at it but the last warlock I tried to kill while he was in radiance took two shots from arm length distance by my invective, one being a headshot and did not die.